assume cs:codesg
codesg segment
		mov ax,4c00h
		int 21h
	
		start:
		mov ax,0
		s:
		nop
		nop
		
		mov di,offset s
		mov si,offset s2
		mov ax,cs:[si]
		mov cs:[di],ax
		
		s0:
		jmp short s
		
		s1: 
		mov ax,0
		int 21h
		mov ax,0
		
		s2:jmp short s1
		nop
	
codesg ends
end start
